Nanostructured Ti-Fe2O3/Cu2O heterojunction photoelectrode for efficient hydrogen production

Sharma, Dipika; Upadhyay, Sumit Kumar; Verma, Anuradha; Satsangi, Vibha R.; Shrivastav, Rohit; Dass, Sahab

doi:10.1016/j.tsf.2014.12.003

Cited by 65 publications

(18 citation statements)

References 36 publications

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“…heterostructure-based photoanodes than with their single-component counter-parts, such as WO 3 /α-Fe 2 O 3 [10] , ZnO/ α-Fe 2 O 3 [11] , n-Si/ α-Fe 2 O 3 [12] , α-Fe 2 O 3 /NiO [13] , α-Fe 2 O 3 :Ti/Cu 2 O [14] , p-Si/ α-Fe 2 O 3 /Au [15] , and α-Fe 16] . Table I shows a review of the characteristics of some typical α-Fe 2 O 3 -based semiconducting heterojunctions that can be found in the literature.…”

Section: Reduction Reactionmentioning

confidence: 99%

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe₂O₃Heterojunction Devices for Hydrogen Production

Bouhjar

Ullah

Chourou

et al. 2017

J. Electrochem. Soc.

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p-CuSCN/n-Fe 2 O 3 heterojunctions were electrochemically prepared by sequentially depositing α-Fe 2 O 3 and CuSCN films on FTO (SnO 2 :F) substrates. The α-Fe 2 O 3 and CuSCN films and the α-Fe 2 O 3 /CuSCN heterojunctions were characterized by Field Emission Scanning Electron Microscopy (FESEM), Energy-Dispersive X-ray spectroscopy (EDX), and X-Ray Diffraction (XRD). Pure crystalline CuSCN films were electrochemically deposited on α-Fe 2 O 3 films by fixing the SCN/Cu molar ratio in the electrolytic bath to 1:1.5 at 60 °C and at a potential of-0.4 V. The photocurrent measurements showed an increase of the intrinsic surface states or defects at the α-Fe 2 O 3 /CuSCN interface. The photoelectrochemical performance of the α-Fe 2 O 3 /CuSCN heterojunction was examined by chronoamperometry and linear sweep voltammetry techniques. It was found that the α-Fe 2 O 3 /CuSCN structure exhibits a higher photoelectrochemical activity when compared to α-Fe 2 O 3 thin films. The highest photocurrent density was obtained for α-Fe 2 O 3 /CuSCN films in 1 M NaOH electrolyte. This high photoactivity was attributed to the high active surface area and to the external applied bias;, which favors the transfer and the separation of the photogenerated charge carriers in α-Fe 2 O 3 /CuSCN heterojunction devices. The flat band potential and the donor density were found to be maximal for the heterojunction. These results suggest a substantial potential to achieve heterojunction thin films in photoelectrochemical water splitting applications.

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Section: Reduction Reactionmentioning

confidence: 99%

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe₂O₃Heterojunction Devices for Hydrogen Production

Bouhjar

Ullah

Chourou

et al. 2017

J. Electrochem. Soc.

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“…The characterization of the films was carried out using FESEM and X-ray diffraction (XRD) techniques. [19][20][21][22][23][24][25][26][27]…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal fabrication and characterization of ZnO/Fe2O3 heterojunction devices for hydrogen production

Bouhjar¹,

Marı́²,

Bessaı̈s³

2018

JAPLR

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ZnO/Fe 2 O 3 heterojunction were prepared by sequentially depositing iron oxide α-Fe 2 O 3 and zinc oxide ZnO films on FTO (SnO 2 :F) substrates. The α-Fe 2 O 3 and ZnO films and the α-Fe 2 O 3 / ZnO heterojunction were characterized by Field Emission Scanning Electron Microscopy (FESEM), Energy-Dispersive X-ray spectroscopy (EDX), and X-Ray Diffraction (XRD). Pure crystalline ZnO films were hydrothermally deposited on α-Fe 2 O 3 films and the process parameters were as follows: hydrothermal time, 4h; temperature 150°C. Finally, the device was transferred to an electric oven and heated at a constant temperature of 90°C for 5h, to develop the ZnO nanostructure. The photocurrent measurements showed an increase of the intrinsic surface states or defects at the α-Fe 2 O 3 /ZnO interface. The photoelectrochemical performance of the α-Fe 2 O 3 /ZnO heterojunction was examined by chronoamperometry and linear sweep voltammeter techniques. It was found that the α-Fe 2 O 3 /ZnO structure exhibits a higher photoelectrochemical activity when compared to α-Fe 2 O 3 thin films. The highest photocurrent density was obtained for α-Fe 2 O 3 /ZnO films in 1 M NaOH electrolyte. This high photoactivity was attributed to the high active surface area and to the external applied bias, which favors the transfer and the separation of the photogenerated charge carriers in α-Fe 2 O 3 /ZnO heterojunction devices.

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“…Applied bias photon-to-current efficiency (ABPE) is calculated by using the following equation: 13 ABPE ¼ J ph ðmA cm À2 Þ| Â ð1:23 À |V b |ÞðVÞ P total ðmW cm À2 Þ…”

Section: Efficiency Measurementsmentioning

confidence: 99%

“…Many modications have been adopted to tune the morphological, optical and electronic properties of a-Fe 2 O 3 in order to make it a suitable and ideal candidate for efficient solar water splitting. Enormous effort has been put in since 1972 in order to make PEC technology commercially viable by employing strategies like nano-structuring, 7,11 doping, 1,12 formations of heterojunction, [13][14][15][16] low energy and swi heavy ion irradiation, 17,18 deposition of catalyst 19 etc.…”

Section: Introductionmentioning

confidence: 99%

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Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe₂O₃ based systems – comparison of two preparation techniques

et al. 2020

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Nanostructured Ti-Fe2O3/Cu2O heterojunction photoelectrode for efficient hydrogen production

Cited by 65 publications

References 36 publications

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe₂O₃Heterojunction Devices for Hydrogen Production

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe₂O₃Heterojunction Devices for Hydrogen Production

Hydrothermal fabrication and characterization of ZnO/Fe2O3 heterojunction devices for hydrogen production

Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe₂O₃ based systems – comparison of two preparation techniques

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Nanostructured Ti-Fe2O3/Cu2O heterojunction photoelectrode for efficient hydrogen production

Cited by 65 publications

References 36 publications

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe2O3Heterojunction Devices for Hydrogen Production

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe2O3Heterojunction Devices for Hydrogen Production

Hydrothermal fabrication and characterization of ZnO/Fe2O3 heterojunction devices for hydrogen production

Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe2O3 based systems – comparison of two preparation techniques

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Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe₂O₃Heterojunction Devices for Hydrogen Production

Electrochemical Fabrication and Characterization of p-CuSCN/n-Fe₂O₃Heterojunction Devices for Hydrogen Production

Effect of morphology and impact of the electrode/electrolyte interface on the PEC response of Fe₂O₃ based systems – comparison of two preparation techniques